（二）Struts2 核心知识

所有的学习我们必须先搭建好Struts2的环境（1、导入对应的jar包，2、web.xml，3、struts.xml）

第一节：Struts2 get/set 自动获取/设置数据

 action代码：
 1 package com.wishwzp.action;
 2 
 3 import com.opensymphony.xwork2.Action;
 4 
 5 public class HelloWorldAction implements Action{
 6 
 7     private String name;
 8     
 9     
10     public String getName() {
11         return name;
12     }
13 
14     public void setName(String name) {
15         this.name = name;
16     }
17 
18 
19     @Override
20     public String execute() throws Exception {
21         System.out.println("执行了Action的默认方法");
22         return SUCCESS;
23     }
24 
25 }

 

 struts.xml配置：
 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 4     "http://struts.apache.org/dtds/struts-2.0.dtd">
 5 
 6 <struts>
 7     
 8   <package name="helloWorld" extends="struts-default">
 9       <action name="hello" class="com.wishwzp.action.HelloWorldAction">
10           <result name="success">helloWorld.jsp</result>
11       </action>
12   </package>
13 
14 </struts>

 

helloWorld.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 ${name }你好！
11 </body>
12 </html>

 

url访问：http://localhost:8080/Struts2Chap02/hello?name=Struts2（会自动设置数据，输出出来）

第二节：ActionSupport 类引入

extends ActionSupport

以后我们都使用ActionSupport了，不再去implements Action了

 

HelloWorldAction2.java 
 1 package com.wishwzp.action;
 2 
 3 import com.opensymphony.xwork2.ActionSupport;
 4 
 5 public class HelloWorldAction2 extends ActionSupport{
 6 
 7     /**
 8      * 
 9      */
10     private static final long serialVersionUID = 1L;
11     private String name;
12     
13     
14     public String getName() {
15         return name;
16     }
17 
18     public void setName(String name) {
19         this.name = name;
20     }
21 
22 
23     @Override
24     public String execute() throws Exception {
25         System.out.println("执行了HelloWorldAction2 Action的默认方法");
26         return SUCCESS;
27     }
28 
29 }

 

 

 

 struts.xml
 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 4     "http://struts.apache.org/dtds/struts-2.0.dtd">
 5 
 6 <struts>
 7     
 8   <package name="helloWorld" extends="struts-default">
 9       <action name="hello" class="com.wishwzp.action.HelloWorldAction2">
10           <result name="success">helloWorld.jsp</result>
11       </action>
12   </package>
13 
14 </struts>

 

 index.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 <form action="hello" method="post">
11     name：<input type="text" name="name"/><input type="submit" value="Submit"/>
12 </form>
13 </body>
14 </html>

 

第三节：Action 设置数据

第一种方式：属性驱动(FieldDriven) A、基本数据类型属性 B、JavaBean 类型属性

第二种方式：模型驱动(ModelDriven)

A、基本数据类型属性

基本数据类型属性，我们在"

B、JavaBean 类型属性

 User.java
 1 package com.wishwzp.model;
 2 
 3 public class User {
 4 
 5     private String userName;
 6     private String password;
 7     
 8     public String getUserName() {
 9         return userName;
10     }
11     public void setUserName(String userName) {
12         this.userName = userName;
13     }
14     public String getPassword() {
15         return password;
16     }
17     public void setPassword(String password) {
18         this.password = password;
19     }
20 }

 

 

 UserService.java
 1 package com.wishwzp.service;
 2 
 3 import com.wishwzp.model.User;
 4 
 5 public class UserService {
 6 
 7     public boolean login(User user){
 8         if("java".equals(user.getUserName())&&"123".equals(user.getPassword())){
 9             return true;
10         }else{
11             return false;
12         }
13     }
14 }

 

 UserAction.java
 1 package com.wishwzp.action;
 2 
 3 
 4 import com.wishwzp.model.User;
 5 import com.wishwzp.service.UserService;
 6 import com.opensymphony.xwork2.ActionSupport;
 7 
 8 public class UserAction extends ActionSupport{
 9 
10     /**
11      * 
12      */
13     private static final long serialVersionUID = 1L;
14     
15     private UserService userService=new UserService();
16     
17     private String userName;
18     private String password;
19     
20     
21 
22     public String getUserName() {
23         return userName;
24     }
25 
26 
27 
28     public void setUserName(String userName) {
29         this.userName = userName;
30     }
31 
32 
33 
34     public String getPassword() {
35         return password;
36     }
37 
38 
39 
40     public void setPassword(String password) {
41         this.password = password;
42     }
43 
44 
45 
46     @Override
47     public String execute() throws Exception {
48         System.out.println("执行了UserAction的默认方法");
49         User user=new User();
50         user.setUserName(userName);
51         user.setPassword(password);
52         if(userService.login(user)){
53             return SUCCESS;
54         }else{
55             return ERROR;
56         }
57     }
58 
59 }

 

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 4     "http://struts.apache.org/dtds/struts-2.0.dtd">
 5 
 6 <struts>
 7     
 8   <package name="helloWorld" extends="struts-default">
 9       <action name="user" class="com.wishwzp.action.UserAction">
10           <result name="success">success.jsp</result>
11           <result name="error">error.jsp</result>
12       </action>
13  
14   </package>
15 
16 </struts>

 

 login.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 <form action="user" method="post">
11     用户名：<input type="text" name="userName"/>
12     密码：<input type="text" name="password"/>
13     <input type="submit" value="登录"/>
14 </form>
15 </body>
16 </html>

 

 success.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 登录成功！
11 </body>
12 </html>

 

 error.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 登录失败！
11 </body>
12 </html>

 

我们还可以在进行优化一下：
 login2.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 <form action="user2" method="post">
11     用户名：<input type="text" name="user.userName"/>
12     密码：<input type="text" name="user.password"/>
13     <input type="submit" value="登录"/>
14 </form>
15 </body>
16 </html>

 

 UserAction2.java
 1 package com.wishwzp.action;
 2 
 3 
 4 import com.wishwzp.model.User;
 5 import com.wishwzp.service.UserService;
 6 import com.opensymphony.xwork2.ActionSupport;
 7 
 8 public class UserAction2 extends ActionSupport{
 9 
10     /**
11      * 
12      */
13     private static final long serialVersionUID = 1L;
14     
15     private UserService userService=new UserService();
16     
17     private User user;
18     
19 
20     public User getUser() {
21         return user;
22     }
23 
24     public void setUser(User user) {
25         this.user = user;
26     }
27 
28 
29 
30     @Override
31     public String execute() throws Exception {
32         System.out.println("执行了UserAction的默认方法");
33         if(userService.login(user)){
34             return SUCCESS;
35         }else{
36             return ERROR;
37         }
38     }
39 
40 }

 

 User.java
 1 package com.wishwzp.model;
 2 
 3 public class User {
 4 
 5     private String userName;
 6     private String password;
 7     
 8     public String getUserName() {
 9         return userName;
10     }
11     public void setUserName(String userName) {
12         this.userName = userName;
13     }
14     public String getPassword() {
15         return password;
16     }
17     public void setPassword(String password) {
18         this.password = password;
19     }
20 }

 

 UserService.java
 1 package com.wishwzp.service;
 2 
 3 import com.wishwzp.model.User;
 4 
 5 public class UserService {
 6 
 7     public boolean login(User user){
 8         if("java".equals(user.getUserName())&&"123".equals(user.getPassword())){
 9             return true;
10         }else{
11             return false;
12         }
13     }
14 }

 

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 4     "http://struts.apache.org/dtds/struts-2.0.dtd">
 5 
 6 <struts>
 7     
 8   <package name="helloWorld" extends="struts-default">
 9       
10       <action name="user2" class="com.wishwzp.action.UserAction2">
11           <result name="success">success.jsp</result>
12           <result name="error">error.jsp</result>
13       </action>
14 
15   </package>
16 
17 </struts>

 

 error.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 登录失败！
11 </body>
12 </html>

 

 success.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 登录成功！
11 </body>
12 </html>

 

模型驱动(ModelDriven)

 login3.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 <form action="user3" method="post">
11     用户名：<input type="text" name="userName"/>
12     密码：<input type="text" name="password"/>
13     <input type="submit" value="登录"/>
14 </form>
15 </body>
16 </html>

 

 error.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 登录失败！
11 </body>
12 </html>

 

 success.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 登录成功！
11 </body>
12 </html>

 

 1 package com.wishwzp.action;
 2 
 3 
 4 import com.wishwzp.model.User;
 5 import com.wishwzp.service.UserService;
 6 import com.opensymphony.xwork2.ActionSupport;
 7 import com.opensymphony.xwork2.ModelDriven;
 8 
 9 public class UserAction3 extends ActionSupport implements ModelDriven<User>{
10 
11     /**
12      * 
13      */
14     private static final long serialVersionUID = 1L;
15     
16     private UserService userService=new UserService();
17     
18     private User user=new User();
19     
20     @Override
21     public String execute() throws Exception {
22         System.out.println("执行了UserAction3的默认方法");
23         if(userService.login(user)){
24             return SUCCESS;
25         }else{
26             return ERROR;
27         }
28     }
29 
30     @Override
31     public User getModel() {
32         // TODO Auto-generated method stub
33         return user;
34     }
35 
36 }

 

 1 package com.wishwzp.model;
 2 
 3 public class User {
 4 
 5     private String userName;
 6     private String password;
 7     
 8     public String getUserName() {
 9         return userName;
10     }
11     public void setUserName(String userName) {
12         this.userName = userName;
13     }
14     public String getPassword() {
15         return password;
16     }
17     public void setPassword(String password) {
18         this.password = password;
19     }
20 }

 

 1 package com.wishwzp.service;
 2 
 3 import com.wishwzp.model.User;
 4 
 5 public class UserService {
 6 
 7     public boolean login(User user){
 8         if("java".equals(user.getUserName())&&"123".equals(user.getPassword())){
 9             return true;
10         }else{
11             return false;
12         }
13     }
14 }

 

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 4     "http://struts.apache.org/dtds/struts-2.0.dtd">
 5 
 6 <struts>
 7     
 8   <package name="helloWorld" extends="struts-default">
 9       
10       <action name="user3" class="com.wishwzp.action.UserAction3">
11           <result name="success">success.jsp</result>
12           <result name="error">error.jsp</result>
13       </action>
14 
15   </package>
16 
17 </struts>

 

第四节：Struts2 处理传入多个值

　　1，处理数目不定的字符串；
　　2，处理数目不定的JavaBean 对象；

1，处理数目不定的字符串:

 hobby.jsp
 1 <%@ page language="java" contentType="text/html; charset=UTF-8"
 2     pageEncoding="UTF-8"%>
 3 <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
 4 <html>
 5 <head>
 6 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
 7 <title>Insert title here</title>
 8 </head>
 9 <body>
10 <form action="hobby" method="post">
11     爱好：
12     <input type="checkbox" name="hobby" value="唱歌"/>唱歌
13     <input type="checkbox" name="hobby" value="跳舞"/>跳舞
14     <input type="checkbox" name="hobby" value="睡觉"/>睡觉
15     <input type="checkbox" name="hobby" value="玩CF"/>玩CF
16     <input type="submit" value="提交"/>
17 </form>
18 </body>
19 </html>

 

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 4     "http://struts.apache.org/dtds/struts-2.0.dtd">
 5 
 6 <struts>
 7     
 8  <package name="helloWorld" extends="struts-default">
 9       <action name="hobby" class="com.wishwzp.action.HobbyAction">
10           <result name="success">success.jsp</result>
11       </action>
12 
13 </struts>
struts.xml

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